1 #ifndef __LINUX_SWIOTLB_H
2 #define __LINUX_SWIOTLB_H
4 #include <linux/types.h>
10 extern int swiotlb_force
;
13 * Maximum allowable number of contiguous slabs to map,
14 * must be a power of 2. What is the appropriate value ?
15 * The complexity of {map,unmap}_single is linearly dependent on this value.
17 #define IO_TLB_SEGSIZE 128
20 * log of the size of each IO TLB slab. The number of slabs is command line
23 #define IO_TLB_SHIFT 11
25 extern void swiotlb_init(int verbose
);
26 extern void swiotlb_init_with_tbl(char *tlb
, unsigned long nslabs
, int verbose
);
27 extern unsigned long swiotlb_nr_tbl(void);
28 extern int swiotlb_late_init_with_tbl(char *tlb
, unsigned long nslabs
);
31 * Enumeration for sync targets
33 enum dma_sync_target
{
37 extern void *swiotlb_tbl_map_single(struct device
*hwdev
, dma_addr_t tbl_dma_addr
,
38 phys_addr_t phys
, size_t size
,
39 enum dma_data_direction dir
);
41 extern void swiotlb_tbl_unmap_single(struct device
*hwdev
, char *dma_addr
,
42 size_t size
, enum dma_data_direction dir
);
44 extern void swiotlb_tbl_sync_single(struct device
*hwdev
, char *dma_addr
,
45 size_t size
, enum dma_data_direction dir
,
46 enum dma_sync_target target
);
48 /* Accessory functions. */
49 extern void swiotlb_bounce(phys_addr_t phys
, char *dma_addr
, size_t size
,
50 enum dma_data_direction dir
);
53 *swiotlb_alloc_coherent(struct device
*hwdev
, size_t size
,
54 dma_addr_t
*dma_handle
, gfp_t flags
);
57 swiotlb_free_coherent(struct device
*hwdev
, size_t size
,
58 void *vaddr
, dma_addr_t dma_handle
);
60 extern dma_addr_t
swiotlb_map_page(struct device
*dev
, struct page
*page
,
61 unsigned long offset
, size_t size
,
62 enum dma_data_direction dir
,
63 struct dma_attrs
*attrs
);
64 extern void swiotlb_unmap_page(struct device
*hwdev
, dma_addr_t dev_addr
,
65 size_t size
, enum dma_data_direction dir
,
66 struct dma_attrs
*attrs
);
69 swiotlb_map_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
,
70 enum dma_data_direction dir
);
73 swiotlb_unmap_sg(struct device
*hwdev
, struct scatterlist
*sg
, int nents
,
74 enum dma_data_direction dir
);
77 swiotlb_map_sg_attrs(struct device
*hwdev
, struct scatterlist
*sgl
, int nelems
,
78 enum dma_data_direction dir
, struct dma_attrs
*attrs
);
81 swiotlb_unmap_sg_attrs(struct device
*hwdev
, struct scatterlist
*sgl
,
82 int nelems
, enum dma_data_direction dir
,
83 struct dma_attrs
*attrs
);
86 swiotlb_sync_single_for_cpu(struct device
*hwdev
, dma_addr_t dev_addr
,
87 size_t size
, enum dma_data_direction dir
);
90 swiotlb_sync_sg_for_cpu(struct device
*hwdev
, struct scatterlist
*sg
,
91 int nelems
, enum dma_data_direction dir
);
94 swiotlb_sync_single_for_device(struct device
*hwdev
, dma_addr_t dev_addr
,
95 size_t size
, enum dma_data_direction dir
);
98 swiotlb_sync_sg_for_device(struct device
*hwdev
, struct scatterlist
*sg
,
99 int nelems
, enum dma_data_direction dir
);
102 swiotlb_dma_mapping_error(struct device
*hwdev
, dma_addr_t dma_addr
);
105 swiotlb_dma_supported(struct device
*hwdev
, u64 mask
);
107 #ifdef CONFIG_SWIOTLB
108 extern void __init
swiotlb_free(void);
110 static inline void swiotlb_free(void) { }
113 extern void swiotlb_print_info(void);
114 #endif /* __LINUX_SWIOTLB_H */
This page took 0.034411 seconds and 6 git commands to generate.